Goodwill and Other Intangible Assets - Narrative (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible asset amortization expense	$ 200,000	$ 300,000	$ 800,000	$ 900,000
Excess purchase price over fair value of net assets acquired (“goodwill”)	$ 140,661,000		$ 140,661,000		$ 129,543,000